package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionMessage;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import springfox.documentation.schema.CollectionType;

import java.util.Collections;
import java.util.List;
import java.util.Set;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增套餐
     *
     * @param setmealDTO
     */
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        // 向套餐表插入数据
        setmealMapper.insert(setmeal);

        Long id = setmeal.getId();

        // 向套餐菜品关系表插入数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (setmealDishes != null && setmealDishes.size() > 0) {
            for (SetmealDish setmealDish : setmealDishes) {
                setmealDish.setSetmealId(id);
            }
        }
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐分页查询
     *
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除套餐
     *
     * @param ids
     */
    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        //判断套餐状态，起售中的套餐不能删除
        Long count = setmealMapper.countByEnableCategoryId(ids);

        if (count > 0) {
            throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
        }

        // 删除套餐表中的数据
        setmealMapper.deleteBatch(ids);
        setmealDishMapper.deleteBySetmealId(ids);
    }

    /**
     * 根据id查询套餐和套餐菜品关系
     *
     * @param id
     * @return
     */
    @Transactional
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        // 根据套餐ID获取套餐信息
        Setmeal setmeal = setmealMapper.getById(id);
        // 根据套餐ID获取套餐内的菜品信息
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);

        // 创建一个套餐视图对象，用于封装套餐及其菜品信息
        SetmealVO setmealVO = new SetmealVO();
        // 将套餐信息复制到套餐视图对象中
        BeanUtils.copyProperties(setmeal, setmealVO);
        // 如果套餐内的菜品信息不为空，则将其设置到套餐视图对象中
        if (setmealDishes != null) {
            setmealVO.setSetmealDishes(setmealDishes);
        }
        // 返回封装好的套餐视图对象
        return setmealVO;

    }

    /**
     * 修改套餐
     *
     * @param setmealDTO
     */
    @Override
    public void update(SetmealDTO setmealDTO) {
        //1.根据id修改套餐基本信息
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.update(setmeal);

        Long setmealId = setmeal.getId();

        //2.根据id修改套餐菜品关系(先删除后插入)
        setmealDishMapper.deleteBySetmealId(Collections.singletonList(setmealId));
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        for (SetmealDish setmealDish : setmealDishes) {
            setmealDish.setSetmealId(setmealDTO.getId());
        }
        setmealDishMapper.insertBatch(setmealDishes);

    }

    /**
     * 套餐起售停售
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，如果套餐内包含停售的菜品，则不能起售
        if (status == StatusConstant.ENABLE) {
            List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
            // 判断套餐内是否有停售的菜品
            if (setmealDishes != null && setmealDishes.size() > 0) {
                //  判断菜品是否都起售
                Long count = setmealDishMapper.countByEnableCategoryId(setmealDishes);
                if (count > 0) {
                    throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            }
        }
        //  修改套餐状态
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 根据分类id查询套餐
     *
     * @param setmeal
     * @return
     */
    @Override
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
            * 根据id查询菜品选项
     * @param id
     * @return
             */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
